Thank you for all the replies. Here is what I've taken away so far:
1. Our intro text was overtly hostile to users. I've removed that.
2. Potential attendees want a clear agenda.
3. Coordinating with another event remains interesting.
So, exploring #3 a bit further - what if we asked for our own track within FOSDEM 2013? (I presume that would be February 2013 in Brussels) It would let us all get together, allow us to have a few sessions targeted at non Wine developers, and could also save us some hassle. And I like Belgian beer.
Would we lose some of the joy of having our very own conference?
We could try it once and go back to the old format if it doesn't work out.
Of course, given our (so far) non participation in FOSDEM 2012, we may not be welcome... :-/
Cheers,
Jeremy